A5043857296- Geology and Paleoclimatology Research
- Coastal and Marine Management
- Archaeology and ancient environmental studies
- Cryospheric studies and observations
- Isotope Analysis in Ecology
- Urban Agriculture and Sustainability
- Urban Green Space and Health
- Organic Food and Agriculture
- Rural development and sustainability
- Atmospheric and Environmental Gas Dynamics
- Land Use and Ecosystem Services
- Marine and Offshore Engineering Studies
- Groundwater and Isotope Geochemistry
- Methane Hydrates and Related Phenomena
- Agricultural Innovations and Practices
- Plant Water Relations and Carbon Dynamics
- Marine Biology and Ecology Research
- Environmental Conservation and Management
- Pleistocene-Era Hominins and Archaeology
- Tree-ring climate responses
- Sustainability and Climate Change Governance
- Arctic and Russian Policy Studies
- Geomagnetism and Paleomagnetism Studies
- Regional Development and Policy
- International Maritime Law Issues
Wageningen University & Research
2008-2023
Altera (United States)
2011
Atria
2008
University of Amsterdam
2008
University of Washington
1981-2004
University of Arizona
1998
Institute of Arctic and Alpine Research
1997
Geological Survey of Canada
1997
Kiel University
1997
CEA Paris-Saclay
1997
A new calibration curve for the conversion of radiocarbon ages to calibrated (cal) has been constructed and internationally ratified replace IntCal98, which extended from 0–24 cal kyr BP (Before Present, 0 = AD 1950). The data set terrestrial samples extends 0–26 BP, but with much higher resolution beyond 11.4 than IntCal98. Dendrochronologically-dated tree-ring cover period 0–12.4 BP. Beyond end tree rings, marine records (corals foraminifera) are converted atmospheric equivalent a...
Research Article| June 01, 1997 Holocene climatic instability: A prominent, widespread event 8200 yr ago R. B. Alley; Alley 1Earth System Science Center and Department of Geosciences, Pennsylvania State University, University Park, 16802 Search for other works by this author on: GSW Google Scholar P. A. Mayewski; Mayewski 2Climate Change Center, Institute the Study Earth, Oceans Space, New Hampshire, Durham, Hampshire 03824 T. Sowers; Sowers M. Stuiver; Stuiver 3Department Geological...
The 3‐km‐long Greenland Ice Sheet Project 2 (GISP2) ice core presents a 100,000 + ‐year detailed oxygen isotope profile covering almost full glacial‐interglacial cycle. Measurements of isotopic fluctuations in snow, frost, and atmospheric water vapor samples collected during summer field seasons (up to 20‰) are compatible with the large abrupt 18 O/ 16 O changes observed accumulated firn. Snow pit δ profiles from GISP2 summit area, however, show rapid smoothing signal near surface. Beyond...
Well‐documented present‐day distributions of stable water isotopes (HDO and H 2 18 O) show the existence, in middle high latitudes, a linear relationship between mean annual isotope content precipitation (δD δ temperature at site. Paleoclimatologists have used this relationship, which is particularly well obeyed over Greenland Antarctica, to infer paleotemperatures from ice core data. There is, however, growing evidence that spatial temporal isotope/surface slopes differ, thus complicating...
It has been suggested that in order to address current complex problems, scientists have take on new roles link the production and use of knowledge. However, what exactly these mean is often not clearly identified. This paper contributes this by discussing relevant literature related different science society presenting results a study perspectives activities knowledge brokering. We identify three brokering repertoires: supplying, bridging facilitating, which differ with respect whether they...
A depth-age scale and an accumulation history for the Holocene have been established on Greenland Ice Sheet Project 2 (GISP2) deep core, providing most continuously dated record of annual layer currently available. The was obtained with use various independent techniques to count layers in core. An surface during by correcting observed thicknesses flow-thinning. Fluctuations provide a continuous detailed climate variability over central Holocene. Climate events, including "Little Age" type...
Values of the oxygen isotope ratios (delta(18)O) in tree-ring cellulose closely reflect delta(18)O values atmospheric precipitation and hence mean annual temperature. The change is 0.41 per mil degree Celsius for selected near-coastal stations. also with altitude, as demonstrated Mount Rainier, Washington. A temperature lapse rate 5.2 degrees +/- 0.5 C 1000 meters calculated from agrees accepted 5 this region. Cellulose carbon dioxide equilibrated leaf water differ by a fixed 16 mil.
Variations in cosmic-ray intensities will produce variations C/sup 14/ production the atmosphere. A comparison is made between sunspot activity and fluctuations concentration during past 13 centuries. Although a definite conclusion not reached, evidence given suggests some correspondence activities (auth)
The δ 13 C records of 11 Pacific coastal trees have been measured. Relationships between C, ring area, and width were investigated. Three the six with longer than 200 years yield a significant (2σ level or better) correlation area. is most pronounced for Sequoia giganteum , where variability in area accounts 60% variance. environmental factors influencing isotopic composition are many. A major portion pre‐1850 record likely caused by variable isotope fractionation trees. Only about one...
The European Union has launched the Blue growth concept as a strategy for stimulating economic in seas. It is accompanying core principles of Green paradigm that seek to stimulate smart, sustainable and inclusive activities. Focusing on growth, this article examines its adequacy enable social innovation use management marine resources. Social interpreted changing behaviour group actors joined network, leading new improved ways collaborative action within beyond. can contribute across...
Following the Blue Growth ambition of European Commission, interest in potential offshore is growing. This paper aimed to contribute discussion on feasibility aquaculture development and its for multi-use with other maritime activities. A review national international projects forms basis paper, where Dutch North Sea used as a case-study area. Analysis technical, economic ecological boundaries indicated that fish culture limited, seaweed cultivation likely gain when challenges related...
European seas are encountering an upsurge in competing marine activities and infrastructures. Traditional exploitation such as fisheries, tourism, transportation, oil production accompanied by new sustainable economic offshore windfarms, aquaculture, tidal wave energy. One proposed solution to overcome possible claims at sea lies combining these part of Multi-Use Platforms Sea (MUPS). MUPS can be understood areas sea, designated for a combination activities, either completely integrated...
Urban Green Space (UGS) is considered to be beneficial for health and wellbeing of urban residents. But there growing evidence that benefits are not equally distributed. In this article we aim understand the role UGS plays in process social exclusion greening strategies can play enhancing equity specific groups excluded: elderly people with dementia, mental issues from an underprivileged neighborhood. The concepts inclusion their relation discussed. Four mechanisms distinguished based on...
Recent efforts to link the isotopic composition of snow in Greenland with meteorological and climatic parameters have indicated that relatively local information such as observed annual temperatures from coastal sites, well more synoptic scale features North Atlantic Oscillation (NAO) temperature seesaw between Jakobshaven, Greenland, Oslo, Norway, are significantly correlated δ 18 O δD values past few hundred years measured ice cores. In this study we review those then use a new record...
Changes in solar constant over an 11 yr cycle suggest a certain, but limited, degree of forcing climate. The high-resolution climate (oxygen isotope) record the Greenland GISP2 (Greenland Ice Sheet Project 2) ice core has been analyzed for (and volcanic) influences. atmospheric 14 C is used as proxy change and compared to oxygen isotope profile core. An annual derived from centimeter-scale measurements available post-A.D. 818 interval. Associated extreme summer winter ratios were found yield...
The radiocarbon calibration curve IntCal04 extends back to 26 cal kyr B P. While several high-resolution records exist beyond this limit, these data sets exhibit discrepancies of up millennia. As a result, no for the time range 26–50 BP can be recommended as yet, but in paper working group compares available and offers discussion information that they hold.
Low average δ 18 O values and large seasonal variations in snow accumulating on the tropical Quelccaya ice cap Peru can be quantitatively explained by a balance calculation of water vapor mass isotopes. Important factors are (1) air stability over Amazon Basin, (2) surface elevation Quelccaya, (3) changes Quelccaya. Seasonal evaporation amplify cycle. Air circulation stability, rather than temperature, determine cycle at and, probably, other low‐latitude sites.
Species-rich mesic forest covered northern Florida as early 14,000 radiocarbon years before present. It probably originated in deciduous tree populations already present locally conifer between 24,000 and 18,600 The cold, dry Late Wisconsin climate ended 14,600 A transitional warm, phase preceded a precipitation increase at